Fishing tool



Oct. 11, 1927.

L 1,645,461 F. H. STAFFORD v FISHING TOOL- Filed Feb. '7, 1927 MemupPatented Oct. 11, 1927.

Unirse smiles FLOYD H. STAFFORD, or :'EAsTLAitD, TEXAS.

rrsnme; froo'jt. i

Application' mea February 7, 1927.- serial No. messa;

in which provision is mede' tol prevent loss offny ofthe tube and toolconnecting means, l

dovvnxthetube, byproviding said tool With me'etns which closes the tubeat its upper en .f

Yet-another ailn is to provide a fishing tool which, While beingrather'sirnpleand inexpensive, and easy lto operate;y Will beefcentgdurable Vand; in every way desirable.

i VWith the foregoing and' minor objects in` view7 the invention residesinV the novel "slibje'ot' matter' hereinafter described' and claimed,thedescripti'onbeing supplemented'v by the aocoimparlying'dravvu1gs.` vFig;` 1 is a vertio'al longitudinal section 11- lustrating the fishing'tool telescoped with the upper endof a tube to be' recovered.

vvhich the connection is establishedbetween' tle'tool-'and tube.`

'Fig 3 is a hrizontals'ection Online 3-3 0fFig.1. p'

Fig. 4 isxa fragmentary vertical section showing the'fishing'toolYconditioned`y for' ishing' 'out a' solid tool'pinstead of atubular ob- J In' the drawing above lbriefly described, tlenumeral 5designates a vertically elonf gated: metal body whichV is preferably'ofcylindrical forni with they :exceptiony of theWrench-engaging,#squaredy portion- 6, thet upper' end of saidv bodybeing reduced and threaded 'as atfor engagement with' a drill` in "jar,whilethe lower end ofsaid body. is

re' fuced endfthreaded asat' '8. A vertically disposed'barrel -Qhas itsupper end threaded 5D' upon the reduced lower end 8 :of the body 5 fandaddition to' this threaded connection,

" V seme eegereenneetingf ineens might es employed if desired. Thebefreit; is intero nally taperedtoward its lovverendV as'indi.- vcated`at 10 and belovvf-t'he taper; is flared' as at 11, permitting itl toreadily'p'ssfover f In the present discl'o'sureiof.thev invention, Y

a dove-tail groove 13' is formed in the lower' extremity of ther b'ody,andI said groove gated form 'and preferably has''its 'ends threaded' inalinenuent vvithfthetheads.

Y Threaded at its upper end-intothe'nut 14, isa preferablycylindricaltongue 15y Whose lower end ispointed as" at116 to be redily`received in the'objeetia if the letter'berof tubular nature.v Theto'ngue1f`5 is enlarged somewhat above thetaper 16 vuolffisitip-'Wardlytaperedaset17, freni the enlarge! ment.` This'enlargemet is ofI tdiaineterfto substantially fill the interior of' atube' tobe Withdrawnfroin .a` Well,I and the internaldi- Varneter'of the barrel. 9,atthe,jlovver""end of* vits-.taper 10,y is of substantially "the samedi-'Inension as the externalgd'iemeter oflr the tube toy bev recovered;Thus;- edovvnvvardly' tapered-,space 18 is "provided betvszeenv thejf vand a seo'o'nd downwardly tapered spao19 Fig. Zien Sectional' viewsimilar toa por- 4 tion of Fig. `1v and disclosing the manner 1n`majorportion 0fthe l'barrer andthe tube' 12',

is 'providedbetiveenl- 'said tube 'and the"` ktongue 1,5; K Provision"is' ni'a'de' for' supplying 'conne'oting'ineans. to these' spaces'lvvhen-tl'leV iish- -ingl tool' is` engaged jvvith thetube'lgfand saidConnecting Ineens will I'tv'fedge into said spaces bite thebarrel"9, thetube12', and j the tongue' 15,v sov thatau tenacious- 1 'donneetion vis'established between' the tool and fthe; a

tribe,y permitting withdrawal of the 'latter from the Wellf 'i In the:-preserrt-"udisolosurej'arr annular, y

frag-ile Vcontainer` '20; surrounds the "torrgl'ie '1 5 -andnormallylengages-stiretaper 17' thereof Aso thatlift islfprevented from slidingentirely'v are' the connecting nreanr abo-ve referred ito,

denoted 'at'QlLj 'Ifhe container"205I isi'ofan external'v diametergreater tB-'anythe' internal the! tubeIZltoloe recove fis 'ng tool! is'comp' aid;

the

ytween the upper end of the tube and the lower end of the body 5. Hence,the nuggets 21 are freed and they will drop by gravity into the spaces18 and 19. Then, by operat ing the drilling jar to lightly 1tap thefishing tool upwardly, the nuggets are wedged into thespaces 18 and 19and caused to eRectively bite into-the tube 12, the tongue 15,

and the barrel 9. Hence', a tenacious connec tion is established betweenthe fishing tool and the tube 12, permitting withdrawal of the latterfrom the'well, and attention is invited to the fact that the operationof the drilling j ar to effectively engage the fishing tool with thetube, produces only upward impulses, so ythat there is no tendency tomore tightly lodge the tube lor the like in the well.

In the present disclosure of the invention,

`any of the nuggets 21 entering the tube 12, '20 assist in connectingthe fishing tool with said tube, but in somel instances, a tongue suchas 15 or some equivalent means, might be provided only Vfor the purposeof closing the upper portion of the tube, to prevent loss of 25 any ofthe nuggets down the latter. 'In the present showing, the enlarged lowerend of 'the tongue 15 closes the upper portion of the tube and preventsloss Vof the nuggests, as

well as assisting in establishing a connection s between the tongue andtube.

When fishing for a solidtool-or the like, rather than one of tubularnature, the tongue 15 is detached, and a container 2Oa of glass or thelike, is supported by wires 22 'or other desired suspending means, -inthe upper por# ftion of the barrel 9, the nuggets or the like being heldwithinsaid container until the latter .is broken by contact with thetool or the like. A main, central passage 23 and w branch passages 24erspreferably provided in the body 5 to receive the wires k22. The f branchpassages 24 may wellfopen through the shoulder at the lower end of thesquared portionf, and the upper ends of said wires @.45 may be secured,for instance by wedges 25,

ydriveninto the passages.

After'withdrawal of a tool or the like from thefwell, it may insomeinstances be loosfvened from engagementfwith the fishing tool, andthe latter easily detached. However, in other instances, it may benecessary to uns thread the barrel 9 from the body 5 and Vdrive saidbarrel some distance onto the recovered object, to loosen the nuggets 21with .55 inthe space 18. It may also be necessary to disconnect thetongue 15 from the fkbody' after disconnection of the barrel 9 from saidbody, whereupon the tongue may be driven somewhat into the tube, toloosen 'the nuggets 60. `in the space 19. If theV barrel and tongue (0rthe barrel alone, `if only said barrel be used) C2111 be successfullydisconnected from the recovered-object,`the tool may loe reas- Smbd forfurther use, but otherwise, it wlll be necessary to take such steps Aaswould prohibit the further use of the tongue, the barrel, or both. Y Y

As excellent results are obtainable from the details disclosed, they maywell be followed. However, within the scope of the invention as claimed,numerous variations may be made. Y o

I claim 1. In a fishing tool, a vertically disposed barrel open at itslower end to receive a lost toolfor other object to be recovered, afragile container in said barrel adapted to be broken by contact withsaid object, and gravity-lowered means in said `container released Vbybreakage' thereof for establishing a tenacious connection between'saidbarrel and said object, said barrel having means independent of saidcontainer to prevent loss of said connecting means from the lower end ofthe barrel. v

2. Ina fishing tool, a. vertically disposed barrel open at its loweryend to receive a lost v tool or other object to be recovered, saidbarrel being internally tapered toward its lower end, a fragilecontainer in saidbarrel'adapted to be broken by contact with saidobject,

and gravity-lowered means in said container.

released by breakage thereof and adaptedfto wedge in the space betweenthe barrel and object to establish a` tenacious connection between them.

3. A structure as specified lin claim 1;V to" gether with means withinthe barrel for closing'the upper end portion of theobject to berecovered, if the latter beef tubular form, preventing loss of anyof'said connecting means through the tube. r..

4:. A structure as specified in claim 1; together with a tongue withinthe `barrel adapted to enter the object tobe recovered, if the latter beyof tubular form,'said tongue having an enlarged'lower end portiontoprevent loss of any of said connecting means down the tube, causing anyof said connecting means received in the tube, to establish a tenaciousconnection lbetween ytube land tongue. Y 5. A structure asy specified inclaim 1; together with a tongue within the barrel adapted to enter the`object, to be recovered, if the latter be of tubular form, said tonguehaving an enlargedV lower en d portiontov prevent loss offany of. saidconnecting means ldown the tube, causingxany of: said connecting meansreceivedin the tube to establish a' tenacious connection between ltubeand tongue, said fragile containerbeing. mounted aroundsaid tongue.

6. Ina fishing tool, a tongueadapted to be lowered into a well andhavingja Ypointed tion to be struck by the tube after the' -containerbeingof annular form and Surrounding said tongue.

8. A structure as Lspecified in claim l; said gravity-lowered connectingmeans consisting of a myriad of sharp-edged nuggets adapted to bite intothe barrel and the (5bject being recovered.

9. A structure as specified infelailn 6; said gravity-lowered connectingmeans consisting .15

of a myriad of sharp-edged nuggets adapted to bite into the tube beingrecoyered andI -1 into ythe tongue.`

In testimony whereof Ihave hereunto af-,IY i i fixed my signature.

FLOYD H. STAFFORD.

